f Subscription.—One copy of the SCIEN- Everything works in harmony TIFIC AMERICAN Will be sent for one yegr—52 numbers— and the objections common to other systems have Postage prepaid, to any subscriber in the United States y been perfected. or Canada, on receipt of three dollars by the pub- The… … Hard Water Made Soft. in size,every number containing sixteen large pages. Mention this paper. THE SCIENTIFIC AMERICAN SUPPLEMENT js published Cities, Towns, Mills, Hotels, and Private Houses Sup- weekly, and includes a very wide range of contents. It eflecting. Telescopes. Equatorial Mountings,…
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